It is narrated from Abdullah bin Abi Qays that the Mothers of the Believers (may Allah be pleased with them) told him that Allah Almighty guided His Prophet (peace and blessings be upon him) to a (particular) deed. So Abdullah said to them: Tell me too, to which deed did Allah guide His Prophet (peace and blessings be upon him)? They said: Allah guided him (peace and blessings be upon him) to standing in prayer at night (tahajjud). This hadith is sahih (authentic) on the condition of Imam Muslim, but they did not record it.